How long will an EcoFlow RIVER Pro run a well pump (1/2 hp)?
It will not. A well pump (1/2 hp) draws 1,000 W and the EcoFlow RIVER Pro's inverter is rated at 600 W, so the station will refuse the load rather than run it slowly. Capacity is irrelevant here — you need a bigger inverter, not a bigger battery.
The classic surge test: many 2,000 W stations will not start one at all.
The numbers
| Setup | Average draw | Cautious | Typical | Best case |
|---|---|---|---|---|
| 1 × well pump (1/2 hp), UK 230 V | 210 W | — | — | — |
| 2 × well pump (1/2 hp), UK 230 V | 410 W | — | — | — |
| 1 × well pump (1/2 hp), US 120 V | 210 W | — | — | — |
- Usable energy: 496 Wh of the 720 Wh on the box, after chemistry, inverter losses and the reserve.
- To keep it going for a full 24 hours you would need about 6,935 Wh of rated capacity — 9.6× this station.
- Start-up: the well pump (1/2 hp) asks for 3,000 W at switch-on against this station's 1,200 W peak — not enough.
Buy the EcoFlow RIVER Pro
Where to buy
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If this is for a power cut
A pump stops when the power does, and with a well that means the taps stop too.
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More: the power cut essentials list (US edition).
What changes the answer
| If instead… | Typical runtime | Change |
|---|---|---|
| The pack is two years old | — | -8% |
| The pack is five years old | — | -20% |
| It is −10 °C outside | — | -20% |
| You run it flat, no reserve | — | +11% |
| You keep 20% back | — | -11% |
If you need it to run longer
These run a well pump (1/2 hp) for at least twice as long as the EcoFlow RIVER Pro does, cheapest first.
| Station | Wh | Typical | Indicative price |
|---|---|---|---|
| Jackery Explorer 2000 v2 | 2,042 | 6 h 58 min | £849 / $999 |
| OUKITEL P2001 Ultimate | 2,000 | 6 h 49 min | £999 / $1,099 |
| Bluetti AC240 | 1,536 | 5 h 13 min | £1,099 / $999 |
| OUKITEL BP2000 | 2,048 | 6 h 59 min | £1,099 / $1,199 |
The cheapest step up: Jackery Explorer 2000 v2
Amazon and approved-programme links are affiliate links; the site may earn a commission at no extra cost to you. Links marked “official site” are untracked. Prices and stock change constantly — check before you buy.
Smaller options that still work
Nothing smaller than the EcoFlow RIVER Pro runs a well pump (1/2 hp) for a useful length of time.
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